Production of sheeted rubber stock.



O. H. ROPER. PRODUCTION OF SHEETED RUBBER STOCK. APPLICATION FILED OUT. 25, 1909. RENEWED MAY 20,1912.

1 11, 1 Patenfied Mar. 9, 1915.

. Wily/- the stock through iifiiL -ilv hppE-ieetioyi file o.

To all whom it may concern:

Be it known that it, H. Home, citizen of the United Etetes, resioling at Belmoot,llflosseohusetts, have iov'eflteel certain new :mol uselul Improvements i .llrocluction of Sheeteil Robber Stools, of which the following is a specification,

My present invention relates to improvements in the nocu ation oi sheetecl rubber stock or compouo, such as usccl in the mom otecture of rubber boots and 8110633, end in feet ruhleei' goose various hinols, and. com. prises a, new method of orodlucing stool: hem ing' portions of tlitl'ereiit characteristics such, for iiistohce, quality or color.

l-lm suitable for carrying out my improved process is shown in the accomio. which,

Figure sectionol elevation, noel Fig, 2 is front view,

ACCUl'fllfi-Z' to my invention, ll use it colon-- tier of oz'eliiieify any (lGSlTBCl form, as shown conventions y iii the imwings, but e, suitohle point in proximity to the two rolls 3 and 4, between which the gum foal, l piovicle one or more partitions oi" dividing plates 5, which 391- iect toward the bite of the rolls oncl cox oi'ms in shape to a portion of the periphery thereof, @n one sicle of this plate is oleeecl o, moss or lump of rublO Bl compound oi one quality or color, as in quality of color, as incliof the partition the impound ore opt self ii the hits of the rolls is reeche-ei, 'ooiieh point they are pressecl. by the rollers into one single homogeneous sheet, one portion, however, of which is insole up ore eomposeel robber one quelity or col or while soother portion is meals up of rubber of soother: "uslity or color, '"ljhe some result may he i. g e WlClo partition 5, or per no; pressing two 5 eiicl blistinct sheets anti th to one. while Warm, through two othee rolls Where they are pressecl into one homogeneous sheet.

The oclventoges of my new process will he apparent by reference to one portion for ample, of 2, rubber hoot or e, to Wit, the sole. As is Well l, SW11 certain 'zfiortions oi? thesoles oi? :uhoer boots shoes Wear much more iropich than elo other portions.

EZXULYEElER STUCK.

gifi lkfilf'l. Hchcwezl Ilia 19.15%, Serial lilo. 698,630.

llerctoiore, as for es I am aware, it been necessary in proolucing soles fromrulr her stock, to have the entire sole of a rubber of e uniform and necessarily high grade quality on account of the wear to which oer; tein portions are subjected, one. this'en ac, count of the amount of rubber used, entails consiclerzthle expense.

According to my present invention, l on, me into the sheet at the points Where the comes, is very high grade 0f111l2 l9e1 -fialeoleted to withstand llllQWQZLl, While at other points I can use s much lower gmcie, the sole proliuced being a complete and homogeneous article and losing capable of Wearing fully as long; soles made entirely of high grade rubber, it being understood that the soles or like articles are out from the sheet in. such e manner that the portion or portions of the sheet o1? hettci' Wearing" qualities are theposecl in each article at the point or points which receive the greatest Wear,

While l have shown in the drawings but one partition, it Will he unolerstood that as many of these might be useol as the circumstances of the cese requirqthus producing as many variations in the quality or color of the different portions of the sheet es desired,

f: clei'm is:-

The herein lescriloecl methocl of mono.

factoring ewticles of sheet robber, having dif erent Wearing; qualities which consists in wiltoneously rising a plurality of sheets s1 from s plurality of rubber stocks having dif le'rent wearing; qualities and uniting seiol sheets by pressure into a, single integral sheet with the line or lines of juncture of the separate sheets in straight lines (lisposenl longitudinally oi the composite sheet, and suhsequeotly cuttin the articles from such sheet in such a manner that the portions of which receive the greatest wear.

2. The process of forming out-soles for two or more batches of rubber compound of different qualities through calender rolls at the seine time so that the edge of one quality will overlap and be forced into that of the other uality forming one homogeneous sheet and su sequently cutting the sheet into outsoles having one portion of a quality diiferon? from that of the other portion of the so e.

3. The process of forming outsoles for rubber boots or shoes consisting of passing two or more batches of rubber compound of different colors through calender rolls at the same timeside by side so that the edge of one color will overlap and be forced into that of the other, forming one homogeneous sheet rubber boots or shoes, consisting in passing and subsequently cutting the sheet into outsoles having one portionof a color difierent from that of the rest of the out-sole.

4. The process of forming outsoles for rubber boots or shoes consisting of passing two or more batches of rubber compound of different qualities and colors through calender rolls at the same time so that the edge of one quality and color will overlap and be forced lnto that of the other, forming one homogeneous sheet having different portions of different qualities and colors, and subsequently cutting the sheet into out-soles having one portion of a diil'erent quality and color than the other portion of the sole.

In testimony whereof, I a-ifix my signature in presence of two witnesses.

CHARLES H. ROPER. Witnesses:

MYRON R. STEVENSON, EPHRAIM A. NICKERBON. 

